Ocular 'non-scarring' mucous membrane pemphigoid associated with anti-laminin-5 antibodies.

Mucous membrane pemphigoid is a rare, chronic autoimmune disease characterized by subepidermal blistering and scarring, predominantly affecting mucous membranes. Ocular involvement frequently occurs and often represents the only manifestation of the disease. We describe a 62-year-old woman with a bilateral 18-month duration of conjunctival hyperaemia, associated with erythema and oedema of the eyelids, lacking any typical ocular signs of mucous membrane pemphigoid such as sub-conjuctival fibrosis and scarring. Histology was not significant. Direct immunofluorescence of the conjunctiva showed IgG, IgA and complement deposition along the basement membrane zone. Immunoprecipitation analysis of affinity purified laminin-5 revealed a band consistent with the beta3 chain of laminin-5. This represents the first case of pure ocular mucous membrane pemphigoid associated with anti-laminin-5 antibodies.